Float or valve regulator and method of making the same



C. F. BURROUGHS. FLOAT 0R VALVE REGULATOR AND METHOD OF MAKING THE SAME.

APPLICATION FILED IAN.I5,1920.

Patentetl Nov. 15, 1921.

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UNITED "STATES PATENT OFFICE.

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.Bpeoiflcation of Letters Patent.

PatentedNov. 15,1921.

Application filed. Ianuarv 15, 1920. Serial No. 351,896.

To all whom it may concern:

Be it known that I, CHARLES F. Bunnouorrs,

Y a citizen of the United States, residing at 122 Prospect'street, East Orange, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Float or Valve Regulators and Methods of Making the Same, fully described and represented in the following specification and the accompanying drawings, forming a part of the same. i This invention relates to a float such as is used in various apparatus for regulating the movement or opening of a valve, as for instance in a carburetor for an explosion en 'ne.

metallic float has been commonly used in such carbureters, but is diflicult to manu-- facture with a ermanent joint where the cover is soldered on, and it therefore fails -,to permanently perform its function in regulatmg the valve connected-with the float.

The present invention comprises a float having abody molded of plastic composition which is not liable to be effected b immersion in gasolene or analo ous li ui s.

A composition is emp oyed t at may be welded at a moderate tem erature (250 degrees Fah.) and is self-hardening, when molded into any shape, after-it regains the atmospheric temperature.

Such a float can be made in a few minutes by placing a charge of suitable composition, as bakelite, in a heated mold and ressin it therein to form an annular cham or which renders the float buoyant, and simultaneously molding a compositlon cover is then secured upon the top of the annular chamber by welding with heat, or b suitable cement thus making the cham water-tight. a

As the structure floats upon the liquid, it is only immersed to a small degree, and the cover and its joint are never affected by the liquid at all.

The nature of the invention will be understood by reference to the annexed drawing,

in which Figure 1 is a vertical central section of a float with the edges of the walls beveled, and a cover applied thereto in readiness to cement; Fig. 2 is a perspective view .provided in the center with a r air-tight and holes in a designates the outer walls of the floatbody, 6 an open channel extending through the center, as is usual in carbureter floats, thus forming an annular chamber a. The cover a is formed as a flat ring or washer adapted to fit upon the annular chamber has annular ribs 0 which fit between the walls of the chamber.

The beveled edges of the walls form an annular cavity .to receive a suitable cement, WhICh forms a water-tight union of the body and the cover. ,6

A dotted line w -w indicates a level to which the float might, in practice, He immersed. v p -f The body and the cover are formed separately in suitable heated molds, and the two parts are then assembled in a mold, such as 1s shown in Fig. 3 adapted to support the body of the float and press the cever tightly upon the same.

The mold with its cope or forct is shown .inserted between the head 9 of a hydraulic press and its platen h, the moldbeing supplaten sufficiently to'operate an ejector o.

The mold Z, Z is formed with a cavit is. adapted to fit the walls a of the float, an is the central channel 6;

The edges of the walls of the float in this figure are shown flat, and a flat cover like plug n to fill that of Fig. 1 is shown fitted to the flat top of the wall, and a force 9' is attached to the platen g and formed with a boss m upon the center to fit within the aperture 11' of the cover. t

Passages m are shown in the force, which would be suitably connected to pipesto circulate hot and cold fluid.

Dowelins g upon the force are fitted to e mold-body Z to center the force thereon.

The mold is shown with a body ortion Z in which a spiral groove 7' isforme through which'hot and cold fluids may be circulated.

A 'acket Z closes the spiral groove.

e-pipes for supplying such fluids are omitted 'from the drawing.

An annular ejector o is shown in the bottom oi'the cavity is surrounding'the plug n, and such ejector is mounted upon two rods p which at the close of the welding operation, and after the float has been cooled, are operated by a frame to push the completed float from themold.

To prevent the collapsing of the walls of the float, when softened by heat, during. the

.welding operation I fill the carbureter with a heavy fixed oil 1- vvhich is not effected at the temperature employed. Such oil is stable at the welding temperature of the composition, and does not produce any pressure in the. float. It is to'be understood that the annular chamber has no connection with any source of pressure at any time during the process-of manufacture, and my process thus differs: from those in which steam, air, or

other fluid under pressure is sulpplied conow article produces an integral union of the cover with the top of the' body, when heated.

When the top is attached to the body of the float the oil is discha by Pieming the cover; such perforation being then sealed by cement.

'It will be understood that the pressure transmltted to the oil simply operates to pressthe walls of the annular chamber 0 directly against the mold and plug n. r

Such a com osition float is found to be far cheaper an more durable than any made of metal.

Having thus set forth the nature of the invention what is. claimed herein is:

1. A hollow-carbureter float -molded of plasticcomposition with an annular cham- 'er, and an annular cover of such plastic composition pressed into integral union with the upper edges of the chamber the finished 'float having an open central channel upon the axis of the annular chamber, as and for the pur ose set forth.

2. A ollow carburetor float molded of plastic composition with an annular chamber' havin an integral bottom and its walls terminated with flat or beveled edges, and a coverof such plastic composition pressed into integral union with the said edges.

3. The method of formin acarburetor float of plastic composition, w ich consists in separately moldin a float-body with an innular chamber an an annular cover adapted to close such chamber, then filling the said chamber with an oil of stable character at the weldin temperature of the composition,

and assem ling the two parts' in a single mold, heating the two com osition parts sufiiciently to make them weld: and ressing the cover into inte al union with t ewalls of the said body, t e oil being sealed in the annular chamber.

In testimony whereof I have hereunto set In hand. 1 x

CHARLES F. BURROUGHS. 

